#[serde(rename)] and #[serde(alias)] should be forbidden on variants of untagged enums #2787
Description
Both attributes does nothing and just confuse users:
#[derive(serde::Deserialize)]
#[serde(untagged)]
pub enum Untagged {
#[serde(rename = "unit", alias = "_1")]
Unit,
#[serde(rename = "newtype", alias = "_2")]
Newtype(u32),
#[serde(rename = "tuple", alias = "_3")]
Tuple(u32, u32),
#[serde(rename = "struct", alias = "_4")]
Struct { a: u32 },
}Instead an error should be emitted that such attributes (maybe some other too!) does nothing and not allowed for untagged enums.